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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 45-60 days after breeding; re-breed as required






2. Provide nourishment for the developing sperm






3. 1-3 days






4. Luteolysis happens because of the ____________ hormone






5. FEED






6. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






7. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






8. 1. brain function - 2. blood flow - 3. willing female






9. 45-60 days after breeding; re-breed as required






10. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






11. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






12. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






13. 4-6 days






14. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






15. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






16. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






17. 1-3 days






18. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






19. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






20. Important 'landmark' during palpation






21. 114 days






22. ~305 days (altough often longer due to breeding difficulties)






23. (male) pushes the testes outward toward the legs for a cool-down off of the body






24. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






25. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






26. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






27. Failure to have one testis (gonad) to descend






28. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






29. The more stressed out the male is - the less sperm he is going to produce






30. Superior genes are _______ to multiply






31. Duct through penis that carries sperm and urine






32. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






33. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






34. ~60 days before calving






35. Allows extension of penis without fibro-elastic penis






36. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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37. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






38. Days which have decreasing daylight hours

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39. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






40. Milk ~305 days - dry 60 days prior to calving






41. Can survive ~7 days in cow. vast majority <48 hours






42. (FSH) causes egg to mature in females






43. Not under a timeline - cow can not be sold as steak






44. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






45. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






46. Implies the amount of estrogen production






47. Male on one pin and female on other side






48. Superior genes are _______ to multiply






49. Animal which has been castrated after puberty






50. Front feet and head first. (except for hogs and dogs)